Robert Witt, or variants, may refer to:

• Sir Robert Witt (art historian) (1872–1952), British art historian
• Robert Witt (academic administrator) (born 1940), chancellor of the University of Alabama System
• Robert William Witt (1930–1967), neoclassical and experimental composer
• Bobby Witt (Robert Andrew Witt Sr, born 1964), American baseball pitcher
• Bobby Witt Jr. (Robert Andrew Witt Jr, born 2000), American baseball shortstop
• Bob Witt, vaudeville performer and a member of the group Witt and Berg

• Pvt. Robert E. Lee Witt, a character from The Thin Red Line (1998 film)

• Witt (surname)